Added a link to TradeTools — the one-app version of this calculator and 61 more, for HVAC, electrical, plumbing, fire protection, solar and carpentry. Nothing else changed.
Only the current version so far — new entries appear as the app ships updates.
Solar ROI Calc & Payback is a tools app by Rizvan Adzhoyan with 10+ downloads (about 14 estimated). Released May 9, 2026. Install growth, rank history, SDKs and ad networks.
From the store listing: “Solar ROI, payback period and lifetime savings calculator.”
